20949890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{5557}}^1$

素因数の和:5606

約数の個数: 32

約数和(自身を含む): 42018480

約数和(自身を除く): 21068590

約数列:

[1, 2, 5, 10, 13, 26, 29, 58, 65, 130, 145, 290, 377, 754, 1885, 3770, 5557, 11114, 27785, 55570, 72241, 144482, 161153, 322306, 361205, 722410, 805765, 1611530, 2094989, 4189978, 10474945, 20949890]

約数ペア:

[(1, 20949890), (2, 10474945), (5, 4189978), (10, 2094989), (13, 1611530), (26, 805765), (29, 722410), (58, 361205), (65, 322306), (130, 161153), (145, 144482), (290, 72241), (377, 55570), (754, 27785), (1885, 11114), (3770, 5557)]